Z ‐diazocine, synthesized as described by Tellkamp, has been photochemically converted into E ‐diazocine by irradiation of its solution at λ =365 nm. After purification, single crystals of E ‐diazocine were obtained by recrystallization at −18 °C from n ‐pentane. The title compound was characterized by NMR spectroscopy and X‐ray crystallography. For its thermal isomerization into the more stable Z ‐isomer, the thermal half‐life was determined by UV/Vis absorption studies. Furthermore, the photochemical behaviour of the compound in the solid state has been investigated.
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Krämer et al. (2017) studied this question.
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